CN1147200A

CN1147200A - Mechanical fastener for disposable article

Info

Publication number: CN1147200A
Application number: CN95192922A
Authority: CN
Inventors: 劳拉·S·尼德霍弗; 利·E·伍德; 斯蒂芬·P·波尔斯基
Original assignee: Minnesota Mining and Manufacturing Co
Current assignee: 3M Co
Priority date: 1994-05-06
Filing date: 1995-03-23
Publication date: 1997-04-09
Also published as: DE69518638D1; IL113277A; KR100328893B1; EP0758877B1; EP0758877A1; IL113277A0; DE69518638T2; AU2127595A; WO1995030397A1; US5554146A; CA2187894A1; MX9605182A; JP3553961B2; US5537722A; AU678714B2; JPH10500326A; KR970702714A; BR9507709A

Abstract

A mechanical fastening system for a diaper (1) or like disposable garment of a male mechanical fastening tab (20) attached to a corner or edge region (4) of the garment with a mating fibrous web (5) on an opposing corner or edge region (7). The male mechanical fastening tab (20) creates two areas of attachment, an outward portion extending beyond the first corner or edge region (4) and an inward area extending inward of the first corner or edge region (4), where both areas of attachement engage the fibrous web on the opposing corner or edge (7). The male mechanical fastening tab (20) with the fibrous web creates a secure non-rotational attachment using a single fastening tab (20).

Description

The mechanical fastener of disposable product

Invention field and background

The present invention relates to have that can to repeat be the disposable diaper and the invalid goods of gatism of solid mechanical closure system, relate in particular to that goods cooperate and the improvement of closed stable aspect.

The goods that commercially available traditional disposable diaper and gatism adult patient use use pressure-sensitive adhesive (PSA) to come closed diapers usually.These PSA are that affixed head stretches out the lateral edges in diaper first lug or bight usually, when diaper being enclosed user and make relative lug overlapping on one's body, are that affixed head is connected on the relative lug or bight.Like this, PSA is affixed head on " maker side " for good and all is connected to a lug with the lateral edges direct neighbor of that lug, is that a free end of affixed head is solid position inwardly in relative lug or bight again by PSA then.

An improvement to top basic binding agent closed-system is to adopt second pair of enclosed member in addition, and they also can be bonded together when two relative lugs are overlapping.This is usually alleged " in be fixing apparatus " generally by being one that the inner surface that solid member is placed on first lug forms, and on its or paired relative lug outer surface corresponding with one is consolidating superficial resistance face or member engages.In this mode, the overlapped surfaces of these lugs is to be that affixed head is directly fixed each other by traditional PSA.United States Patent (USP) № 4,699,622 has mentioned the application of second closed-system, this patent describe one use one outer be affixed head and in be the elastic diaper of fixing apparatus.Traditional outer be that affixed head stretches out vertical side of the edge in first bight of diaper.In be that fixing apparatus can be " VELCRO " bar, gluing paster, button or snap-fastener, but the machinery system on preferably a kind of outer surface that places the second relative bight that engages with first bight inner surface anter, that formed by non-woven webs consolidates member.United States Patent (USP) № 5,019,072 has described United States Patent (USP) № 4,699, the improvement of 622 structures, be that fixing apparatus is a pair of eclipsed gluing paster of can be bonding or peeling off on first bight or lug bight relative with second or lug in wherein describing, these pasters be set to when connect the outside gluing be affixed, the relative lug of diaper or bight when overlapping, these pasters are also overlapping.United States Patent (USP) № 5,066,289 has described a kind of improvement to the preferred configuration among the United States Patent (USP) № 4,699,622, it be by provide a kind of foaming porous substrates on the first bight inner surface as outer pressure-sensitive gluing be affixed charge releasing belt.It is the connection effect of fixing apparatus that this foaming porous charge releasing belt has improved the positive machinery that is positioned at the diaper second relative lug.United States Patent (USP) № 3,610,244 has also proposed second closing feature.The way that this patent is described is that to use traditional PSA in first bight of diaper be affixed head.In addition, when biphase across corner and traditional PSA are affixed nose heave when folded, the inner surface in this first bight also contacts the PSA paster on the second relative bight outer surface.By adopting four gluing junction points to come to provide more firm secure fit for active baby.

Though use one second closure member in eclipsed bight, by preventing the eclipsed bight of diaper because user moves or since the rotation respect to one another that the elastic force of the elastic part of diaper produces move, can improve the cooperation of diaper, but the manufacturing of these systems is often too complicated, and every diaper needs the solid member of eight gluing or mechanical systems.

Brief summary of the invention

The present invention relates to a kind of disposable product that is used for, especially such as the machinery of the invalid disposable product of confession gatism of diaper etc. or the closed-system of hook-and-loop class.Sun machinery is that first end of affixed head stretches out the outer ledge in first lug or bight, and its second end puts in the outer ledge in this first bight.Machinery is that the two ends of affixed head can engage with paired, woven, loop bonding, knitting etc. or the non-woven fleece (web) on relative second lug or the bight, and machinery is that the two ends of affixed head are that the aspectant of an affixed member and an inboard is affixed member as an outer machinery.Two solid members of machinery system that provided by closed-system of the present invention are cooperation and the closed stability that affixed head has improved disposable product with unit tool easy to use.

Brief Description Of Drawings

Fig. 1 is the partial plan layout of first embodiment of the invention, and it shows a positive machinery that is arranged on a diaper one bight is affixed head.

Fig. 2 is the cutaway view of Fig. 1 embodiment.

Fig. 3 is the axonometric chart of the disposable diaper with the solid closed-system of machinery system shown in Fig. 1 and 2.

Fig. 4 is the side view of second embodiment of the invention.

Fig. 5 is the partial side view of third embodiment of the invention.

Fig. 6 is that Fig. 5 embodiment is used for diaper side view before.

Fig. 7 is the partial side view of fourth embodiment of the invention.

Fig. 8 is that Fig. 7 embodiment is used for diaper side view before.

Fig. 9 is the partial side view of fifth embodiment of the invention.

Figure 10 is the partial side view of sixth embodiment of the invention.

Detailed description of the invention

The present invention is described in some preferred embodiments that are used in the closed-system on traditional disposable diaper sheet below in conjunction with the present invention in detail.Yet, the preferred embodiment of the solid closed-system of the present invention's machinery system also can be used for other goods, the invalid clothes of for example using in the hospital of the gown of growing up, medicated cap, gatism and other diaper structure etc., this is conspicuous for a person skilled in the art.

Consult Fig. 1 to 3, disclosed first preferred embodiment of mechanical closure system of the present invention among the figure in conjunction with the water absorption main body 1 of a conventional diaper sheet.Diaper water absorption main body 1 comprises the rear panel 3 of the anter 2 and an impermeable liquid of a liquid permeable, is a traditional water absorption pad (figure does not show) between them.At least in first bight 4 of first end 8 of diaper sheet 1 machinery being arranged is affixed 20, and this joint is designed to adhere to paired solid member 5 of machinery system and/or the rear panel 3 at diaper sheet 1 second end.When putting diaper, be that the solid closed-system of machinery system of the present invention is in use the time, first bight 4 of disposable diaper first end 8 is with accordingly the second relative bight 7 in the opposite end 9 of diaper sheet 1 is superimposed, and biphase like this across corner 4 and 7 just has the surface that adjoins each other.In the conventional diaper chip architecture of Fig. 3, wherein two first bights 4 are arranged on the second relative bight 7 of two correspondences, solid member 20 of machinery system and solid member 5 engagements of rear panel 3 and/or paired machinery system, and the diaper sheet constitutes a waist mouth around the user trunk.

The anter 2 of fluid permeable can adopt the known any traditional material that is used for diaper, comprise spun-bonded fibre net (spunbond web), meltblown non-woven webs (meltblown web) and carded web (carded web) etc., by thermoplasticity and hydrophobic polymer fiber, for example make traditionally by polyolefin or polyester fiber for these fleeces.

Rear panel 3 is impermeable fleece of a liquid or thin film, be a kind of thin thin polymer film traditionally, for example a kind of thin polyolefin film, be the thin film (blends or coextruded versions) of polyethylene or polypropylene, mixture, fusion or coextrusion, general thickness is less than 2 mils.Liquid is porous but the permeable porous membrane of steam also can be used to process rear panel 3 not.

In a preferred embodiment, rear panel 3 comprises a liquid-impervious film and a kind of non-woven or woven, loop bonding, knitting or the like fibroreticulate lamination arranged, and this fleece can be that machinery on affixed 20 is fixing structure 25 interlocks with machinery.Proper is, this lamination can pass through adhesive stacks, decorative pattern welding, i.e. sound wave or heat or cold weld or directly form fleece form on all or part of liquid-impervious film.Fleece should be outwards in case with machinery be affixed interlock.

Reasonablely be, not only having the enough machinery that can make joint 20 as the outer field fleece of rear panel lamination 3 or paired mechanical component 5 is fiber bulkiness, fiber spacing and the fibre number that fixing structure 25 penetrates, and also should have the enough machinery that makes is the major part of fixing structure 25 and the fibre density and the fiber number of fibroreticulate fiber interlock.

Specifically, the solid member 5 of rear panel 3 or paired machinery system can be a kind of liquid-impervious film and a kind of lamination such as the round fabric that is disclosed in United States Patent (USP) № 5,176,670 or any other traditional round fabric.The round fabric can be any traditional, fibrous loop with required suitable substrate, comprises supatex fabric.Fabric is made by traditional fibre, and fiber comprises nylon, polyester, polypropylene or other similarly synthetic or natural fiber.One preferable round fabric such as United States Patent (USP) № 5,256,231 are disclosed, wherein ripple directional fiber extrusion bonded one-tenth one thermoplasticity substrate, " SCOTCH-MATE " round fabric (can buy from 3M company) or " MILLILOCK " (a kind of round fabric of the loop bonding that can buy from Millliken company).

Fleece, comprise the round fabric, also can be stacked on the impermeable barrier layer of a liquid on the fleece one side by extruding laminated process extruding, be used as then rear panel or the paired solid member 5 of machinery system or again lamination last layer thin film, gauze or the like to strengthen its intensity.

In first embodiment of the closed-system of the present invention shown in Fig. 1 and 2, machinery is affixed 20, and to have positive machinery be fixing structure 25, and this structure can have the shape of any suitable interlock fiber.Fiber interlock shape is generally an axial little bar, and this upright little bar has a little basal rod part to divide the 28 and one terminal fiber occlusion portion 29 in little bar 25 outermost end.It is 28 narrower than fiber occlusion portion 29 that little basal rod part divides, and do not have outwardly projection or fiber occlusion structure.This little basal rod part divides 28, and to have be straight side generally, or from being that affixed 20 surface is gradually little gradually to fiber occlusion portion 29.The shape of fiber occlusion portion 29 can be the suitable shape of mushroom-shaped, disk, J hook, bilobate shape (T shape), leafy shape or any other energy interlock fiber.Dividing the 28 positive machineries to the outmost surface of fiber occlusion portion 29 from little basal rod part is that the height of fixing structure generally is at least 75 microns, preferably 200 to 400 microns.The suitable material that is used to make hook has the thermoplastic polymer such as polyester, polyolefin and nylon etc.

Machinery is affixed 20 has an outer end 21 and of stretching out 4 edges 11, bight to put in the inner end 22 in diaper sheet 1 bight 4, and both

ends

21 and 22 are separated by a transitional region 23.Inner end 22 and outer end 21 can both be the fleece interlock of the outside of solid member 5 and/or rear panel lamination 3 with paired fibre machinery.Outer end 21 is that affixed 20 joint provides interlock easily with separating for ease of positive machinery.In normal dress with between the operating period, limited relative bight 4 and 7 rotation to each other with the inner end 22 of solid member 5 interlocks of rear panel 3 or paired system and moved.

In the embodiment of Fig. 1 and 2, it is being that 27 facing surfaces, 26 places, surface of fixing structure 25 are connected in diaper sheet 1 with containing positive machinery that machinery is affixed 20.Inner end 22 can be connected on the diaper sheet 1 in the mode that any positive machinery that can not destroy or weaken basically on the inner end 22 is the fiber interlock function of fixing structure 25, and this mode comprises gluing bonding, intermittently or some welding (sound wave, heat or cold weld etc.) etc.

Be that affixed substrate 24 is preferably one by being that the one made of the same thermoplastic polymer of fixing structure 25 or the thermoplastic film that separates are made with positive machinery, yet substrate 24 can be a fiber net structure, and positive machinery is that fixing structure is by knitting or similar operations formation.Other substrate and egative film also can use, as traditional thermoplastic film, fleece etc.

Fig. 4 shows another embodiment of the solid closed-system of machinery system of the present invention.Identical numbering is represented identical parts among the figure.In this embodiment, machinery is affixed 20 and is connected on the substrate 32 that it is the portable part 33 of fixing structure or adhesive that this substrate 32 has the machinery that do not have that extends.Portable part 33 can make and be snapped what close is that affixed head/substrate stack 30 is removed.Substrate structure 32 can be any soft substrate, and traditional is a kind of thermoplastic film or fleece.Having used substrate 32 just can be affixed 20 to machinery by a successive pressure-sensitive adhesive layer 31 adds up.For example, machinery is affixed 20 and can scales off from a belt that is coated with successive pressure-sensitive adhesive agent.This belt can be laminated on the substrate 32 continuously, and cutting into a piece machinery then is affixed lamination 30, is bonded on the diaper sheet 1 again, and does not need on the production line inner end 22 is being carried out gluing coating or be fused on the diaper sheet 1.

Fig. 5 shows another embodiment of Fig. 4 structure.Increased a girth member 36 among the figure, it can make machinery be between affixed 20 outer end 21 and the diaper sheet 1 be connected more firm.This girth member generally is a PSA belt, and the one end adheres on the diaper sheet, the other end or directly or by substrate 32 adhere on the outer end 21 that machinery is affixed head, as shown in Figure 5.Structure shown in Figure 5 can each belt that separates or film combinations on diaper line become, or resembles example as shown in Figure 6, provides as the strap configurations that lamination is good in advance.In the pre-laminated tape minor structure of Fig. 6, girth member 36 and substrate 32 preferably have low viscous single face applying glue (low adhesion backsize) or release coat (release coating) 38 and 39, make the structure of pre-lamination launch by a successive reel release, and do not have the obstruction of

adhesive layer

37 and 31 as belt.Girth member 36 also can be used for other embodiments of the invention, for example also can be used for the embodiment as Fig. 1.

Fig. 7 and 8 embodiment are respectively the modification of Figure 4 and 5 embodiment, and among the figure, an end 45 of substrate 40 puts in the diaper sheet, make the solid member 20 of machinery system have two places forever to be connected on the diaper sheet, no longer need the girth member that separates 36 as Fig. 5 and 6 embodiment.The embodiment of this embodiment and Fig. 4 to 6 and similarly structure another kind of the variation can also be arranged, that is exactly the end by folding substrate 40, forms a softer folded edge 44 and forms a finger and mention part 43.The machinery of Fig. 7 is that fixing structure can be made up of on diaper line thin film that separates or belt, or cuts down from a pre-laminated tape structure as shown in Figure 8, wherein, provides pressure sensitive

adhesive adhesion coating

46 and 47 to be connected on the diaper, as shown in Figure 7.The substrate 40 of the pre-laminated tape of Fig. 8 has release or the less single face applying glue coating (figure does not show) of adhesion usually.

In the embodiment of Fig. 9, the substrate 50 of Fig. 7 embodiment adds a reinforce belt 56 in addition, so that improve the bonding strength of the solid member 20 of machinery system.When substrate 50 is the lower fleeces of a kind of hot strength, the non-woven webs of for example a kind of light compacting or point bonding, when for example a kind of spun-bonded fibre net or meltblown non-woven webs, this design needs.

Figure 10 shows the inner end 22 of the solid member 20 of machinery system is connected to another method on the diaper sheet 1.In this example, inner end 22 is sandwiched between the anter 2 of impermeable rear panel 3 of liquid and fluid permeable, wherein, anter has a structure that porousness is enough, making positive machinery is that fixing structure 25 can be enough to stretch out outwardly from this structure, with the fibroreticulate fiber on aforesaid paired solid member 5 of machinery system of interlock or the rear panel 3.In this embodiment, positive machinery be fixing structure 25 preferably more greatly, can stretch out about 150 microns from substrate 24 at least.This embodiment is the inner end 22 of fixing structure 25 by positive machinery, provides the solid member 20 of mechanical system to carry out mechanical engagement with very firm being connected with the anter with fluid permeable of diaper sheet.It is being connected of opposite face 26 and rear panel 3 of affixed 20 that can stick with glue as mentioned above, welding etc. finished other.This type of attachment is together with using reinforce belt or separately to be connected in the outer surface of rear panel 3 and/or being that the substrate on affixed 20 surface 26 can be used for above-mentioned any embodiment.

In general, inner end 22 is short than outer end 21, makes present dynasty's anter 2 surpass inner end 22 when folding outer end 21.So just can be before using, making a part of machinery is that fixing structure 25 mechanically engages with the fiber of anter 2, to keep the folding of outer end 21.Yet this seems so unimportant in the method for attachment of Figure 10 because machinery be fixing structure 25 outer end 21 also can with the engaging of anter 2 at the fiber in the zone that is connected with inner end 22.Machinery is that fixing structure 25 can also be from engaging.

During use, outer end and

inner end

21 and 22 respectively with fleece of paired machinery system solid member 5 and/or the fleece interlock that forms with lamination on the impermeable rear panel 3 of liquid or form with other form, make outer end 21 and inner end 22 fully by interlock, thereby the connection between bight 4 and 7 can be fixed and can not rotate.By selecting suitable positive machinery is that affixed 20 fibroreticulate fiber or structure 25 provide shearing resistance and peel off resistance.Generally should be by the shearing resistance that the inner end 21 that is affixed 20 provides greater than 500 grams, so the shearing resistance of size generally can be preferably 2 to 5cm by width approximately greater than 1.5cm, and the length of inner end is that affixed head provides for 1 to 3cm machinery.Outer end 22 generally exceeds the lateral edges 1cm of bight portion 4 at least, and preferably 3 to 6cm.

On the basis of disclosed here description of the present invention or example, the present invention can also have other embodiment, and this is conspicuous for a person skilled in the art.Description and the special embodiment that describes only are in order to demonstrate the invention, the invention is not restricted to the foregoing description, and scope of the present invention and essence spirit should be as described in the following claim.

Claims

1. closed-system that is used for the disposable absorbent sex aids, comprising: one has the disposable absorbent article of two bight portions at least, and there be the internal layer and the impermeable skin of a liquid of a fluid permeable in each bight portion; And one and described two bight portions in the adjacent machinery in first first edge be affixed head, have one to be first fleece that affixed head engages on the impermeable outer outer surface of liquid of the relative bight of in the described two bight portions second portion with described machinery, described machinery is that to have a first surface and a second surface, described at least first surface to have the positive machinery that can engage with described first fleece be fixing structure for affixed head; One with the internal layer described machinery adjacent and that engage of described fluid permeable be first inner end of affixed head; The one described machinery that stretches out described first edge of the described first bight portion is the outer end of affixed head, it is characterized in that it is fixing structure that described inner end and described outer end have described positive machinery, makes both ends to engage with described first fleece.

2. closed-system as claimed in claim 1, it is characterized in that, the internal layer of described fluid permeable is a non-woven webs, described outer end is than described inner minister, make that when described outer end is folded on the described inner end part of the described outer end that to have described positive machinery be fixing structure can engage with the impermeable internal layer of described non-woven webs liquid.

3. as each the described closed-system in claim 1 and 2, it is characterized in that, the impermeable skin of described liquid comprises the impermeable thermoplastic film of a liquid, and described first fleece comprises a non-woven webs on the impermeable thermoplastic film of described liquid that is attached in the described at least second relative bight, one woven, loop bonding or knitting fabric.

4. as each the described closed-system in the claim 1 to 3, it is characterized in that described inner end is the gluing ground of described second surface of affixed head or the internal layer that focus is bonded in described fluid permeable at described machinery.

5. as each the described closed-system in the claim 1 to 3, it is characterized in that, described inner end is that fixing structure mechanically engages with described non-woven webs internal layer by described positive machinery, making positive machinery is that fixing structure stretches out by described non-woven webs, and can engage with described first fleece.

6. as each described closed-system in the claim 1 to 5, it is characterized in that, be on the inner end of described second surface of affixed head and the outer end a successive pressure-sensitive adhesive coating to be arranged at machinery, wherein by described pressure sensitive adhesive adhesion coating, described outer end is attached on the substrate, and described the inner is attached in the described first bight portion.

7. as each described closed-system in the claim 1 to 6, also comprise: one be connected in the impermeable skin of described liquid in the inner, be connected in the girth member that described machinery is affixed outer end or substrate in the outer end.

8. banded laminated construction, comprise: one has the substrate of first surface and second surface, it is fixing structure that described first surface has positive machinery, described substrate also has one to be folded first inner end and the outer end that line separates, make inner end and outer end in described first surface adjacency, the second surface of described substrate has a pressure sensitive adhesive adhesion coating, one second substrate is attached to the described outer end of described substrate by described pressure sensitive adhesive adhesion coating, described second substrate has one in the extension that described fold line extends outwardly, and there is the second pressure sensitive adhesive adhesion coating described extension.

9. banded lamination as claimed in claim 8, it is characterized in that, described second substrate comprises the lamination of one the 3rd substrate, this substrate has a first surface and a second surface, described the 3rd substrate first surface be connected in described outer end, one reinforce belt comprises described extension, and the described second pressure sensitive adhesive adhesion coating on the described reinforce belt is bonded in the second surface of described the 3rd substrate.